Extron Electronics MAV Plus Series - Manual (Page 35)

Installation, cont’d
CrossPoint 450 Plus and MAV Plus Switchers • Installation 2-12
Sync termination switches (CrossPoint 450 Plus only)
3 Sync termination switches — The CrossPoint 450 Plus matrix switchers have
sync termination switches on the rear panel for inputs 1 through 8
(CrossPoint 450 Plus 2412, 2424, 3216, and 3232) or inputs 1 through 4
(CrossPoint 450 Plus 84, 88, 124, 128, 816, 168, 1212, 1616). The switches
(figure 2-15) provide a way to condition non-TTL sync levels greater than
5 Vp-p, enabling the sync to be properly passed from input to selected
output(s). The matrix switchers have two sets of sync termination switches;
one for horizontal or combined sync and a second set for vertical sync.
CrossPoint 450 Plus
816, 168, 1212, and 1616
CrossPoint 450 Plus
84, 88, 124, and 128
H SYNC V SYNC
V V
15
16
15
16
1 4 2 3 1 4 2 3
O U T P U T S O U T P U T S
I N P U T S I N P U T S
SYNC V SYNC
H
HV 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Ω
Ω
Ω
Ω
CrossPoint 450 Plus
2412, 2424, 3216, and 3232
Figure 2-15 — Sync termination switches
Each switch provides the option of selecting either 510 ohms or 75 ohms.
The 75 ohms position is required only for an input with non-TTL sync, greater
than 5 V p-p. The normal position is 510 ohms.
An input that produces an out of sync display, a display that is rolling
vertically and/or tearing horizontally, could indicate a non-TTL sync input.
A device that is known to output non-TTL sync levels (greater than 5V p-p)
should be connected to one of the inputs with sync termination switches, and
the switches for that input should be set to the 75 ohm position. If you are not
sure, check the specifications in the user’s manual for the input device.